Coke Calcination Process

The quality of calcined petroleum coke used in primary aluminum production is affected by each of the refining and calcining processes including choice of crude, many of the initial...

During the calcination process of all the green coke at 700–1500 ℃, with the increase of the calcination temperature, the fracture of the aromatic ring branch chain and the polycondensation reaction of the aromatic ring continue to occur in the upper, middle, and bottom calcined cokes. The carbon layer structure is arranged more orderly ...

CALCINATION PROCESS OF GREEN PETROLEUM COKE IN ROTARY KILN . Peng LI a, b, Baokuan LI a, b *, Zhongqiu L IU a, Yang YU a. a School of Metallurgy, Northeastern University, Shenyang 110819, China .

Rotary Kiln Petroleum Coke Calcination Process. A. A Boateng, in Rotary Kilns (Second Edition), 2016. Abstract. Petroleum coke is a by-product of the coker process in the oil industry. In its raw form, it is also called "green coke" or green petroleum coke. Calcined petroleum coke is an important industrial commodity that links the oil and ...

interlayer compounds – are introduced in the interplanar spacing of coke during the calcination process. The study of additives used to modify raw materials of the production process of developed mesophase and further needle coke production allows us to conclude that the most promising modifiers are organic compounds, namely polymers and ...

11 - Rotary Kiln Petroleum Coke Calcination Process: Some Design Considerations. Pages. 265-290. View chapter. Abstract. Petroleum coke is a by-product of the coker process in the oil industry. In its raw form, it is also called "green coke" or green petroleum coke. Calcined petroleum coke is an important industrial commodity that links the ...

The thermal diffusivity of petroleum coke decreased during the calcining process. With increasing temperature, coefficient of heat conductivity and specific volume heat of the petroleum coke increased with a decreasing variation rate. The research provides a database for the calcining graphitization process of petroleum coke. Introduction

GPC must undergo a heat treatment process, known as calcination, at temperatures exceeding 1200°C. This thermal journey serves several essential purposes: 1. Driving Out Volatile Matter (VM):...

The calcination of green petroleum coke in rotary kilns presents low operational costs due to the fact that the process is energy self-suf®cient (i.e. does not require fuel), and that it presents higher processing capacity compared to the …

On a commercial scale, aluminium is produced by the Hall-Héroult process, using consumable carbon anodes . Anode manufacture requires calcined petroleum coke (CPC). Coke calcination is performed in different types of kilns, of which rotary kilns are the most commonly used. Rio Tinto operates four rotary kilns at three sites in Canada.

Green petroleum coke (GPC), as the by-product of petroleum refineries [1,2], could be used as the unique material to manufacture calcined petroleum coke (CPC) through calcination process, which is ...

Calcined coke is the best material for making carbon anodes for smelting of alumina to aluminum. Petroleum coke is usually calcined in a gas-fired rotary kiln or rotary hearth at high temperatures ...

The calcination process of petcoke involves heating the raw material to high temperatures to remove volatile matter and impurities, resulting in a high-quality, high-carbon …

standard of calcined petroleum coke (CPC). It requires a coke with no moisture, no volatile matter and low sulfur contents with an appropriate crystalline structure. This is achieved through calcination processes. It is accomplished by gradual heating of the green coke (GC) at ambient temperature to a temperature of around 1390°C in a

The invention relates to a method of calcining coke. Green coke containing water and volatile matter is calcined in three or more stages in heating ovens connected in series and whose temperature and atmosphere can be controlled or regulated independently, the stages consisting in evaporating the water, drying and preheating the coke, distilling and burning the volatiles of …

Calcination is the main technological stage where composition homogeneity and structure peculiarities of a definite coke are formed. To meet the technology requirements one should …

The semi needle coke was calcined to prepare calcined coke. Argon was selected as the protective gas, the heating rate from room temperature to 900℃ was 10℃/min, and from 900℃ to 1200℃ was 5℃/min. The calcination process was carried out at 1200 °C for 5 h, and then, the calcined needle cokes were freely cooled to room temperature.

The methodology of kinetics-based simulation described in this study may be used to predict coke calcining kilns performance regardless of the green coke composition. Kinetic analysis of the green petroleum coke calcining processes using the simulation program HYSYS and actual industrial data is presented. The rates of physical and chemical phenomena of interest, such …

Petroleum coke is one of the main raw materials used for carbon anode in the aluminum electrolytic industry. Calcination of petroleum coke is the first process of prebaked anode preparation.1,2 Green petroleum coke needs be calcined to remove moisture and volatiles, and to obtain an appropriate crystalline structure.3 The class of calcined petroleum coke …

The Outotec Advanced Process Control () system for Coke Calciner will significantly contribute to achieve the process goals, with the following additional benefits: • Improvement …

Coke calcination is a process that involves heating green petroleum coke to purify it and eliminate volatile materials for subsequent processing. Due to the complexity of the rotary kiln used in this process, conducting experimental studies can be challenging and restricted. However, quantitative analyses based on developed models can provide a foundation for …

It also covers calcination of petcoke, how rotary kilns are used as incinerators for chlorinated hydrocarbons. ... Rotary Kiln Petroleum Coke Calcination Process: Some Design Considerations. 11.1. Introduction; 11.2. …

Calcination Calcination is a high temperature pyrolysis treatment of GPC that upgrades it to properties better suited for specific industrial end-uses. Calcination implies the heating of GPC in a unit

In this work, four kinds of green needle cokes (coal-based green needle coke and petroleum-based green needle coke) have been used as the raw materials to investigate the changes of micro-structure during the calcination process.

the calcination process according to the formal mechanism of nucleation described by the Avrami equation [6]. Regarding to coke calcination process in a rotary kiln, the equation may be presented in the following form: ¿* L Á . ? Á - . ? - L ì × × ç Í . ké :6 ; o@6 á Í (3) where H 1 and H 2 are thermal functions of coke and

the invention concerns a process for calcination of raw coke obtained by delayed cokefaction, in heating ovens with at least three stages in series. this process consists of: a. evaporating the water contained in the raw coke and drying and preheating the coke; b. distillate the volatile matter contained in the dry coke; and c. burn the volatile material from step b and calcine the …

This process is carried out in a calcining rotary kiln. ... Petroleum coke calcination in rotary kilns will be described by means of a model based on mass and energy conservation. Heat transfer by conduction, convection and radiation is taken into account. Mass transfer occurring between the solid and gas phases is mainly due to natural gas ...

Calcined Petroleum Coke (CPC): Calcined petroleum coke, or CPC, is the result of the calcination process applied to GPC. Calcination involves heating GPC at temperatures exceeding 1200°C to drive ...

Petroleum coke is usually calcined in rotary kiln. It is a very prevalent problem of unstable production conditions and low recovery rates in coke calcination process. The temperature field in calcining zone is a crucial factor that affects the output and quality of calcined petroleum coke (CPC). Based on the analysis of the major factors affecting the temperature field in above …

The coke calcining process is a time-temperature function concerning three main step process involving: drying, removing of volatile matters (VM) and densification. ... The final quality of the calcined coke is directly related to the …